中文摘要：

从 cancellous 骨头的超声的反散射信号能被用来由于它提供骨头微观结构的信息的能力有效地诊断骨质疏松症。吝啬的 trabecular 骨头间距 MTBS 是为骨头微观结构的 characteriza- tion 的重要参数之一。这份报纸建议了基于基本频率评价估计方法的 MTBS，它从模拟被用于反散射信号，并且在 vitro 牛的 trabeculae。估计的 MTBS 与简化反的过滤器追踪的那些相比筛算法和 autoregressive AR cepstrum 方法。结果证明建议方法面对小 signal-to-noise 比率 SNR，和到常规的弥漫的 scatterers 的大散布力量比率为有更精确的估计和更小的估计的变化的 MTBS 评价是很柔韧的。

英文摘要：

Ultrasonic backscatter signals from the cancellous bone can be used to diagnose osteoporosis effectively due to its ability to provide the information of bone microstructure. Mean trabecular bone spacing （MTBS） is one of the important parameters for characteriza- tion of bone microstructure. This paper proposed a MTBS estimating method based on the fundamental frequency estimation, which was applied to backscatter signals from simulations, and in vitro bovine trabeculae. The estimated MTBS were compared with those of simplified inverse filter tracking （SIFT） algorithm and autoregressive （AR） cepstrum method. The results demonstrated that the proposed method is very robust for the MTBS estimation with more precise estimates and smaller estimated variance in the presence of a small signal-to-noise ratio （SNR）, and a large scattering strength ratio of diffuse scatterers to regular ones.